Superior canal dehiscence syndrome (Q42135): Difference between revisions
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Síndrome da deiscência do canal semicircular superior (SDCSS) ocorre quando o osso fino ou deiscente sobre o canal semicircular superior, melhor demonstrado na TC, permite a transmissão de pressão entre o canal e o espaço intracraniano. Vertigem e nistagmo podem ocorrer quando o canal é estimulado por sons altos ou alterações na orelha média ou pressão intracraniana. A hiperacusia aos sons conduzidos pelos ossos pode causar perda auditiva condutiva, tinnitus pulsátil ou autofonia (ouvir os sons do próprio corpo como altos ou distorcidos). Embora o defeito ósseo possa ser congênito, um traumatismo craniano pode ser o passo final que abre uma janela labiríntica funcionalmente móvel. | |||
| description / en | description / en | ||
Superior canal dehiscence syndrome (SCDS) occurs when thin or dehiscent bone over the superior semicircular canal, best demonstrated on CT, allows pressure transmission between the canal and the intracranial space. Vertigo and nystagmus may occur when the canal is stimulated by loud sounds or changes in middle ear or intracranial pressure. Hyperacusis to bone-conducted sounds can cause conductive hearing loss, pulsatile tinnitus, or autophony (hearing one’s own body sounds as loud or distorted). While the bony defect may be congenital, head trauma can be the final step that opens a functionally mobile labyrinthine window. | |||
Revision as of 08:32, 13 August 2026
Superior canal dehiscence syndrome (SCDS) occurs when thin or dehiscent bone over the superior semicircular canal, best demonstrated on CT, allows pressure transmission between the canal and the intracranial space. Vertigo and nystagmus may occur when the canal is stimulated by loud sounds or changes in middle ear or intracranial pressure. Hyperacusis to bone-conducted sounds can cause conductive hearing loss, pulsatile tinnitus, or autophony (hearing one’s own body sounds as loud or distorted). While the bony defect may be congenital, head trauma can be the final step that opens a functionally mobile labyrinthine window.
| Language | Label | Description | Also known as |
|---|---|---|---|
| default for all languages | AB31.3 |
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| English | Superior canal dehiscence syndrome |
Superior canal dehiscence syndrome (SCDS) occurs when thin or dehiscent bone over the superior semicircular canal, best demonstrated on CT, allows pressure transmission between the canal and the intracranial space. Vertigo and nystagmus may occur when the canal is stimulated by loud sounds or changes in middle ear or intracranial pressure. Hyperacusis to bone-conducted sounds can cause conductive hearing loss, pulsatile tinnitus, or autophony (hearing one’s own body sounds as loud or distorted). While the bony defect may be congenital, head trauma can be the final step that opens a functionally mobile labyrinthine window. |
